Governor for engines.



PATENTBD AUG. 22, 1905.

H. E. MOLEAN.

- GOVERNOR FOR ENGINES.

APPLICATION FILED MAY12,1905.

all

Mil/leases UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Aug. 22, 1905.

Application filed May 15,1905. Serial No. 260,175.

To a whom it may concern.-

Be it known that I, HECTOR E. MoLnAN, of the town of Manilla, in thecounty of Victoria, Province of Ontario, in the Dominion of Canada, haveinvented certain new and useful Improvements in Governors for Engines;and I do hereby declare that the following is a full, clear, and exactdescription of the same.

This invention relates to improvements in governors for engines, asdescribed in the present specification and set forth in the accompanyingdrawings, that form part of the same.

The invention consists, essentially, of a rotating shaft, an auxiliarymotive power, a gear mechanism having connection with said shaft andsaid auxiliary motive power, and a controlling-gear actuated through thedifferential operation of the said gear mechanism and governing thespeed of the shaft.

The object of the invention is to produce a governor in which theconstruction will be simple and durable and at the same time form apositive and accurate means of governing the feed, and whereby belts,weights, springs, or delicate operating parts will be entirelyeliminated.

1n the drawings, Figure 1 is a perspective view showing the main shaftof asteam-engine and the governing device. Fig. 2 is a side elevation ofthe device partially in section.

Like characters of reference indicate corresponding parts in eachfigure.

In the following specification the invention is described as applied toa steam-engine for the sake of convenience in the explanation.

a is the main shaft of an engine, and Z) is a spur-gear fixedly securedon the shaft (0.

0 is a shaft journaled in the pillow-block (Z, having a bevel gear-wheele at the outer end thereof.

f is a spur-pinion secured to the shaft 0 intermediate of its length androtating therewith and meshing with the spur-gear Z).

9 is a vertical shaft journaled in the footbearing it and arranged indirect alinement with the shaft 0. v is a bevel-gear fixedly se- 7c andZ are bevel-gears secured to and rotating with the said sleeve 7', theformer secured to the upper end thereof and the latter intermediate ofthe length of said sleeve with the bevels reversed.

m is an auxiliary engine or motor of any suitable form, operating at apredetermined number of revolutions per minute, having a shaft 12extending in the direction of and terminating adjacent to the shaft g.

0 is a bevel-pinion fixedly secured to the end of the shaft on andmeshing with the bevel gear-wheel land in this manner rotating the saidgear-wheel Z and sleeve j independently from the shaft y p is abevel-gear fixedly secured to the shaft 9 immediately above the sleeve7'.

q is a U-shaped bracket having a central orifice 9' in the lower portionthereof and the shafts .9 journaled in the bearings tat the up: perextremities thereof.

a represents bevel-pinions fixedly secured to the inner ends of theshafts s and meshing with and operatively connecting the gears 7 and j),thus establishing the connection between'the auxiliary engine at and themain shaft (6.

o represents spur-pinions fixedly secured on the outer ends of theshafts s.

w is a yoke having a central boss 00, an orifice fl/ through said bossand yoke, and a key ,2 in the wall of said orifice. The yoke w isslidably arranged on the shaft g, the key extending into the keyway 2.The downwardly-extending arms 3 and 4: of the yoke are offset in reversedirections and have the racks 5 and 6 engaging the pinions o fromopposite sides.

7 represents guiding-lugs extending from" the bracket q around the arms3 and f and re taining the racks 5 and 6 in engagement with the pinionso.

8 is a collar encircling the shaft 9 and having the recess 9 in itslower side and fitting loosely over the boss 0 on the yoke, permittingthe latter to turn freely without rotating the said collar. The collar 8has the pins 10 extending outwardly therefrom and the threaded orifice11 through the wall of said recess. A set-screw 12 is inserted in thethreaded orifice 11 and extends into an annular groove 13 in the boss into retain the collar 8 on the boss.

14 is a leverpivotally supported at 15 and having a quadrant 16 at oneend meshing with the pinion 17, secured to the valve-spindle,

and at the other end a fork 18, in the prongs of which are the slots 19,through which the pins 10 from the collar extend.

In the operation of this device the auxiliary motor is placed adjacentto the main shaft driven by the engine to be governed. Theangularly-arranged supplementary shaft g is journaled in a suitablebearing adjacent to the main shaft and to the shaft extending from theauxiliary motor. It will be thus seen that the main shaft and the shaftfrom the auxiliary motor arewithin operating distance of thesupplementary shaft and may be readily connected to the gears on thesaid supplementary shaft to operate the same.

In the arrangement described the shaft 0, journaled in the pillow-block(Z, has a fixedlysecured gear-wheel f meshing with the gearwheel Z) onthe main shaft. The said shaft 0, journaled in the pillow-block, has atits out r end a bevel-gear e, meshing with a bevelgear 1:, fixedlysecured to the supplementary shaft. This insures the rotation of thesupplementary shaft correspondingly with the main shaft. The auxiliarymotor drives the bevel-gear fixedly secured to the sleeve 7, and thisgearrotates the sleeve, which causes the gear at the upper end thereofto revolve. The bevel-gears 7:; and 1), one on the supplementary shaftand the other on the sleeve, revolve in the same direction, and thebevelpinions a, interposed therebetween, effect the differential meansof governing the position of the quadrant at the end of the lever 14 inrelation to the pinion 17 on the valvespindle. The bevel-pinions "u,connecting the gear 1) on the supplementary shaft, and the gear it onthe sleeve will remain stationary continuously, while the said gear onthe supplementary shaft and the said gear on the sleeve continue torevolve at an even speed as the yoke and bracket supporting the saidpinions also rotate; but in the event of a difference between the numberof revolutions of the shaft of the auxiliary motor and the .main shaftoccurring the said bevel gearwheels will immediately show suchdifference by variation in speed, and as the gear-wheel 70, secured tothe sleeve, always travels at the same speed, governed by thepredetermined number of revolutions of the motorshaft a, the variationswill be entirely confined to the bevel gear-wheel p, fixedly secured tothe supplementary shaft. The moment this variation of speed occurs thebevelpinions a, connecting the said two gearwheels, must rotate. Thiswill cause the spurpinions c, meshing with the racks 5 and 6 of the yokew, to rotate and move the said yoke upwardly 0r downwardly on the saidsupplementary shaft, and as the said yoke is lifted upwardly ordownwardly the collar secured thereto is caused to slide on the saidshaft, which lifts or drops the forked end of the controlling-lever 14:,and consequently turns the quadrant 16 on its pivot. This governs thefeed to the engine and increases or diminishes the speed of the mainshaft, as the case may be, until the said main shaft is brought to thedesired number of revolutions per minute.

The increase of the speed of the fixed gear on the supplementary shaftsin relation to the rotation of the gear on the sleeve will cause thebevel-pinions to rotate in one direction, while the diminishing of thespeed of the said gear on the supplementary shaft in relation to therotation of the gear on the sleeve will of course cause the pinions to1'0- tate in the other direction, and thus insure the upward or downwardmovement of the yoke, as set forth. The salient feature of thisinvention is the application of a gear mechanism to the automaticregulation of the feed to govern the speed at a predetermined number ofrevolutions for a minute. It is well known that the application of agear mechanism to the regulation or government in mechanical devices ispositive and less liable to get out of order than any other form ofconstruction, and, further, it insures the exact operation of the valvein a steam-engine and in an electrical engine the exact operation of thelinger of the rheostat.

It must be understood that this regulating device may be applied to manyforms of engines or motors, though the most common application willlikely be to steam-engines. Another point may be mentioned in connectionwith this device, and that is that the dependence for governing oncentrifugal action is entirely eliminated.

hat 1 claim as my invention is- 1. In a governor for engines, thecombination with a main shaft having a gear-wheel mounted thereon androtating therewith, and an auxiliary motive power driving a gearwheelsecured to its shaft, of a supplementary shaft journaled adjacent to theaforesaid shaft, a gear-wheel secured thereto eoacting with thegear-wheel of the main shaft, a gearwheel secured thereto intermediateof its length, a loose sleeve surrounding a portion of the said shaft, agear-wheel secured thereto coacting with the intermediately-arrangedgear-wheel on the supplementary shaft, a gear-wheel on said sleevedriven by the auxiliary motor and turning said sleeve, acontrolling-lever, and means establishing a differential connectionbetween said lever and gear mechanism, as and for the purpose specified.

2. In a governor for engines, the combination with a main shaft having agear-wheel mounted thereon and rotating therewith, and an auxiliarymotive power driving a gearwheel secured to its shaft, of asupplementary shaft journaled adjacent to the aforesaid shaft agear-wheel secured thereto coacting with the gear-wheel of the mainshaft, a gear-wheel secured thereto intermediate of its length, a shaftjournaled parallel with the main shaft having a gear-wheel securedthereto meshing with the aforesaid gear-wheel on the main shaft and agear-wheel meshing with one of the said gear-wheels on the supplementaryshaft, a loose sleeve surrounding a portion of the said supplementaryshaft, a gear-wheel secured thereto coacting with theintermediately-arranged gear-wheel on the supplementary shaft, agear-wheel on said sleeve driven by the auxiliary motor and turning saidsleeve, a controlling-lever, and means establishing a differentialconnection between said lever and gear mechanism, as and for the purposespecilied.

3. In a governor for engines, the combination with a main shaft having agear-wheel mounted thereon and rotating therewith, and

'an auxiliary motive power driving a gearwheel secured to its shaft, ofa supplementary shaft journaled adjacent to the aforesaid shaft, agear-wheel secured thereto coacting with the gear-wheel of the mainshaft, a gear-wheel secured thereto intermediate of its length, a

loose sleeve surrounding a portion of the said shaft, a gear-wheelsecured thereto coacting with the intermediately-arranged gear-wheel onthe supplementary shaft, a gear-wheel on said sleeve driven by theauxiliary motor and turning said sleeve, a yoke slidably arranged on thesupplementary shaft, having downwardly-depending arms offset and racksarranged thereon, pinions suitably journaled and connecting said racksand the aforesaid coacting gears, and a lever connected with said yokeat one end and at the other to the engine driving the main shaft, as andfor the purpose specified.

4. In a governor for engines, the combination with a main shaft having agear-wheel mounted thereon and rotating therewith, and an auxiliarymotive power driving a gearwheel secured to its shaft, of asupplementary shaft journaled adjacent to the aforesaid shaft, agear-wheel secured thereto coacting with the gear-wheel of the mainshaft, a gear-wheel secured thereto intermediate of its length, a loosesleeve surrounding a portion of the said shaft, a gear-wheel securedthereto coacting with the intermediately-arrauged gear-wheel on thesupplementary shaft, a gear-wheel on said sleeve coacting with said gearon the auxiliary motor-shaft and turning said sleeve, a yoke slidablyarranged on the supplementary shaft having downwardly depending armsoffset and racks arranged thereon, a U- shaped bracket embracing thesaid supplementary shaft connected to said yoke and having shaftsjournaled at the upper extremities thereof and bevel-pinions fixedlysecured to the inner ends of said shafts and meshing with the aforesaidcoacting gears and spurpinions fixedly secured to the outer ends of saidshafts and meshing with the racks on said yoke, and a lever having oneend supported on said yoke and the other end operatively connected tothe engine to be governed, as and for the purpose specified.

Signed at Toronto this 25th day of April, 1905.

HECTOR E. MCLEAN.

Witnesses:

H. DENNISON, E. WILKIN.

